Battery module, battery pack and electric equipment

Abstract

The invention discloses a battery module, a battery pack and electric equipment. The battery module comprises a bracket, a battery cell assembly and a detection piece, the support is provided with a first opening which penetrates through the support. At least part of the battery cell assembly is arranged in the support, and the battery cell assembly comprises a plurality of battery cells. One end of the detection piece is connected with the battery cell, and the other end of the detection piece penetrates through the first opening and is configured to be connected with the circuit board. Under the condition that the battery module is subjected to external force or the battery cell expands, the other end of the detection piece penetrates through the first opening, the first opening can provide a moving space for the detection piece, and the risk that the detection piece is damaged is reduced.

Description

Battery modules, battery packs and electrical equipment Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery module, a battery pack, and an electrical device. Background Art

[0002] Currently, battery modules are widely used in drones, electric vehicles, smart energy storage devices, and other fields. Currently, battery cells are tested using test pieces. Under normal circumstances, soft-pack batteries can be squeezed during use, causing damage to the test pieces connected to the battery cells.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module, a battery pack and an electrical device to reduce the risk of the detection part being squeezed.

[0005] An embodiment of the present application provides a battery module, comprising a bracket, a battery cell assembly and a detection member. The bracket is provided with a first opening, and the first opening passes through the bracket. At least a portion of the battery cell assembly is provided in the bracket, and the battery cell assembly includes a plurality of battery cells. One end of the detection member is connected to the battery cell, and the other end of the detection member passes through the first opening, and the other end of the detection member is configured to be connected to a circuit board. In the event that the battery module is subjected to external force or the battery cell expands, the first opening can provide movement space for the detection member by allowing the other end of the detection member to pass through the first opening, thereby reducing the risk of damage to the detection member.

[0006] Optionally, in some embodiments of the present application, the bracket includes a top wall, and the top wall and the battery cell assembly are arranged along a first direction. Along the first direction, a first opening partially penetrates the top wall; a portion of the detection member is exposed through the first opening. The first opening provides space for the detection member to move, reducing the risk of damage to the detection member.

[0007] Optionally, in some embodiments of the present application, the bracket includes a front wall connected to the top wall, with the front wall and the battery cell assembly arranged along a second direction. Along the second direction, a portion of the first opening extends through the front wall; a portion of the detection member is exposed through the first opening. The first direction is perpendicular to the second direction. The portion of the first opening provides space for movement of the detection member, reducing the risk of damage to the detection member.

[0008] Optionally, in some embodiments of the present application, the battery cell includes a battery cell housing, an electrode terminal, and an electrode assembly. The electrode assembly is disposed within the battery cell housing, and the electrode terminal is connected to the electrode assembly and extends from the battery cell housing. The portion of the electrode terminal extending from the battery cell housing and the first opening are located on different sides of the battery cell housing to facilitate assembly of the detection component.

[0009] Optionally, in some embodiments of the present application, the detection member further includes a first connecting portion, one end of the detection member includes the detection portion, and the other end of the detection member includes a second connecting portion, the first connecting portion connects the detection portion and the second connecting portion, and the detection portion is disposed between two adjacent battery cells. The first connecting portion extends from the first opening to the bracket.

[0010] Optionally, in some embodiments of the present application, the second connecting portion is provided on a side of the bracket away from the battery cell assembly along a direction opposite to the first direction.

[0011] Optionally, in some embodiments of the present application, the first connecting portion includes a first section, a second section, a third section, and a bent section. The first section connects to the detection portion, the first section connects to the second section, the third section connects to the second section, and the second connecting portion connects to the second section. At least a portion of the first section is disposed between two adjacent battery cells. The second section and the first section are spaced apart along the first direction. The third section is exposed from the first opening. The third section connects to the first section and the second section via the bent section.

[0012] Optionally, in some embodiments of the present application, part of the bending section is exposed in the first opening, and the first opening can provide space for the bending deformation of the bending section, which is further beneficial for reducing stress pulling in the bending section, thereby further reducing the risk of damage to the detection component.

[0013] Optionally, some embodiments of the present application further include a first member disposed between two adjacent battery cells. The first member has a second opening, and a portion of the detection member is disposed within the second opening. The second opening extends from a sidewall of the first member along a second direction. The first member protects the detection member, reducing the risk of damage to the detection member caused by compression.

[0014] Optionally, in some embodiments of the present application, along the first direction, the thickness of the detection piece is less than the thickness of the first component, thereby reducing the risk of the detection piece being compressed and causing damage.

[0015] Optionally, in some embodiments of the present application, the battery cell assembly further includes a buffer having an elastic modulus greater than that of the first component. The buffer is connected to the battery cell assembly and / or positioned between two adjacent battery cells, thereby reducing the risk of damage to the detection component.

[0016] Optionally, in some embodiments of the present application, along the second direction, the second opening passes through one of the side edges of the first component.

[0017] Optionally, in some embodiments of the present application, an adhesive member is further included, and the detection member is connected to the battery cell via the adhesive member.

[0018] Optionally, in some embodiments of the present application, the thermal conductivity of the adhesive is greater than the thermal conductivity of the battery cell housing, which is beneficial for conducting heat to the detection element and improving the accuracy of the detection.

[0019] Optionally, in some embodiments of the present application, a first recess is provided on the side of the top wall facing away from the battery cell assembly, and part of the detection member is provided in the first recess. Along the first direction, the depth of the first recess is greater than or equal to the thickness of the detection member, thereby reducing the space occupied by the detection member in the first direction.

[0020] Optionally, in some embodiments of the present application, a first fixing portion is further included, the top wall is provided with a second recess, the first fixing portion is provided in the second recess, and the detection part is located between the top wall and the first fixing portion, which is conducive to fixing the second section, can reduce the warping of the second section, and reduce the risk of the second section being damaged by friction.

[0021] Optionally, in some embodiments of the present application, along the first direction, the depth of the second recess is greater than the thickness of the first fixing portion, which can reduce the space occupied by the first fixing portion in the first direction.

[0022] Optionally, in some embodiments of the present application, a second fixing portion is further included, a third recess is provided on the front wall, the second fixing portion is provided in the third recess, and part of the detection part is located between the battery cell shell and the second fixing portion, which is conducive to fixing part of the first bending section, reducing the deformation of the first bending section, and reducing the risk of friction damage to the first bending section.

[0023] Optionally, in some embodiments of the present application, along the second direction, the depth of the third recess is greater than the thickness of the second fixing portion, which can reduce the space occupied by the second fixing portion in the second direction.

[0024] Optionally, in some embodiments of the present application, an elastic member is further included, wherein at least a portion of the elastic member is disposed in the first opening, and along the second direction, the elastic member is located between the second fixing portion and the detection member, and the elastic member connects the second fixing portion and the detection member. The elastic member is disposed in a gap between the second fixing portion and the third section, so that the second fixing portion acts on the third section via the elastic member, thereby facilitating the fixing of the detection member.

[0025] Optionally, in some embodiments of the present application, the detection element includes a temperature sensor.

[0026] Optionally, in some embodiments of the present application, the bracket includes a first bracket and a second bracket, the first bracket is connected to the second bracket to form a receiving space, and the first opening passes through the first bracket.

[0027] An embodiment of the present application provides a battery module, comprising a bracket, a battery cell assembly, and a detection member. The bracket is provided with a first opening, and the first opening extends through the bracket. At least a portion of the battery cell assembly is disposed within the bracket, and the battery cell assembly includes a plurality of battery cells. One end of the detection member is disposed between adjacent battery cells; alternatively, one end of the detection member is disposed along a first direction with the battery cell assembly. The other end of the detection member extends through the first opening, and the other end of the detection member is configured to connect to a circuit board.

[0028] An embodiment of the present application provides a battery pack, comprising the battery module of any one of the above embodiments, and further comprising a circuit board, wherein the circuit board is arranged on a side of the bracket away from the battery cell assembly, and the other end of the detection member is connected to the circuit board.

[0029] Optionally, in some embodiments of the present application, the battery pack includes a shell, and the battery module is arranged in the shell.

[0030] An embodiment of the present application provides an electrical device, comprising the battery pack in any one of the above embodiments.

[0031] When the battery module, battery pack and electrical equipment are subjected to external force or the battery cell expands, the other end of the detection member passes through the first opening, and the first opening can provide movement space for the detection member, thereby reducing the risk of damage to the detection member. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram showing a partial structure of a battery pack in some embodiments.

[0033] FIG. 2 is an exploded schematic diagram of a portion of the battery pack in FIG. 1 .

[0034] FIG3 shows a schematic structural diagram of a battery cell in some embodiments.

[0035] FIG4 is a schematic diagram showing a partial structure of a bracket in some embodiments.

[0036] FIG5 shows a schematic structural diagram of a battery module in some embodiments.

[0037] FIG6 is a schematic diagram showing a partial structure of a battery pack in some embodiments.

[0038] FIG. 7 shows a schematic cross-sectional view of FIG. 1 along the II-II direction.

[0039] FIG8 is an enlarged schematic diagram showing a partial structure of the battery module in FIG7 .

[0040] FIG9 is a schematic structural diagram of a battery pack from another perspective in some embodiments.

[0041] FIG10 is a schematic structural diagram of a battery pack from another perspective in some embodiments.

[0042] FIG11 shows a schematic structural diagram of a battery pack from another perspective in some embodiments.

[0043] FIG. 12 is a schematic diagram showing an exploded view of a portion of the structure of a battery module in some embodiments.

[0044] FIG13 is a schematic diagram showing a partial structure of a battery pack in some embodiments.

[0045] FIG14 is a schematic diagram showing a partial structure of a battery pack in some embodiments.

[0046] FIG15 is a schematic structural diagram of a battery cell, a first component, and a detection component in some embodiments.

[0047] FIG16 is a schematic cross-sectional view of FIG1 along the III-III direction.

[0048] FIG17 is an enlarged schematic diagram showing a partial structure of the battery pack in FIG16 .

[0049] FIG18 is a schematic structural diagram of a battery pack in some embodiments.

[0050] FIG19 shows a schematic structural diagram of electrical equipment in some embodiments.

[0051] Description of main component symbols:

[0052] Battery module 100

[0053] Battery cell assembly 10

[0054] Battery 11

[0055] Battery cell housing 111

[0056] Main body 111a

[0057] First sealing portion 1112

[0058] First side 1113

[0059] Second side 1114

[0060] Second sealing portion 1115

[0061] Sealing portion 111b

[0062] Electrode terminal 112

[0063] Second component 101

[0064] Conductive sheet 102

[0065] First fixing portion 103

[0066] Second fixing portion 104

[0067] Elastic member 105

[0068] Bracket 20

[0069] First bracket 201

[0070] Second bracket 202

[0071] First opening 20a

[0072] Top wall 21

[0073] Arc portion 21a

[0074] first recess 211

[0075] Second recess 212

[0076] Fourth recess 213

[0077] Front wall 22

[0078] Third recess 221

[0079] Back wall 23

[0080] Right wall 24

[0081] Left wall 25

[0082] Bottom wall 26

[0083] Fifth recess 261

[0084] Test piece 30

[0085] Detection Unit 31

[0086] First connecting portion 32

[0087] Section 1 321

[0088] Section 2 322

[0089] Section 3 323

[0090] Bend section 324

[0091] Section 4 325

[0092] First bending section 324a

[0093] Second bending section 324b

[0094] The third bending section 324c

[0095] Fourth bending section 324d

[0096] Circuit board 40

[0097] First member 50

[0098] Second opening 50a

[0099] Guide portion 511

[0100] Adhesive 60

[0101] Buffer 70

[0102] Connector 80

[0103] Shell 90

[0104] Battery Pack 200

[0105] Electrical equipment 300

[0106] First direction X

[0107] Second direction Y

[0108] The third direction Z

[0109] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0110] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0111] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally disposed element. When an element is considered to be "disposed" or "provided on" another element, it may be directly disposed on the other element or there may be a centrally disposed element.

[0112] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0113] It should be understood that, considering the factors of actual processing tolerance, the term "perpendicular" in the technical solution of this application is used to describe the ideal state between two components. In the actual production or use state, there may be a state that is approximately perpendicular between the two components. For example, in combination with the numerical description, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic point of view, the components can be considered as "straight lines" or "planes" if the overall extension direction is a straight line or a plane.

[0114] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0115] The terms "left", "right", "top", "bottom", "front", "back" and similar expressions used herein are for illustrative purposes only and are not intended to limit the present application.

[0116] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the number of the components is two or more.

[0117] In the first direction X, it includes the first direction X and the direction opposite to the first direction X, in the second direction Y, it includes the second direction Y and the direction opposite to the second direction Y, and in the third direction Z, it includes the third direction Z and the direction opposite to the third direction Z.

[0118] An embodiment of the present application provides a battery module, comprising a bracket, a battery cell assembly and a detection member. The bracket is provided with a first opening, and the first opening passes through the bracket. At least a portion of the battery cell assembly is provided in the bracket, and the battery cell assembly includes a plurality of battery cells. One end of the detection member is connected to the battery cell, and the other end of the detection member passes through the first opening, and the other end of the detection member is configured to be connected to a circuit board. In the event that the battery module is subjected to external force or the battery cell expands, the first opening can provide movement space for the detection member by allowing the other end of the detection member to pass through the first opening, thereby reducing the risk of damage to the detection member.

[0119] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0120] 1 to 3 , an embodiment of the present application provides a battery module 100 , including a cell assembly 10 and a detection component 30 . The cell assembly 10 includes a cell 11 , and the detection component 30 is configured to detect a signal of the cell 11 .

[0121] In some embodiments, the detection element 30 is configured to detect at least one of the current, voltage, resistance, moisture outside the cell housing 111, and electrolyte outside the cell housing 111 of the battery cell 11. This application uses the detection element 30 detecting the temperature of the battery cell 11 as an example for description.

[0122] The battery cell assembly 10 includes a plurality of battery cells 11 . One end of the detection member 30 is connected to the battery cells 11 , and the other end is configured to be connected to the circuit board 40 .

[0123] In some embodiments, one end of the detection member 30 is disposed between adjacent battery cells 11 ; or, one end of the detection member 30 and the battery cell assembly 10 are disposed along the first direction X.

[0124] In some embodiments, each battery cell 11 includes a battery cell housing 111 , and the detection member 30 is connected to at least one of the battery cell housings 111 .

[0125] In some embodiments, the battery cell assembly 10 includes a plurality of battery cells 11 stacked in a first direction X.

[0126] In some embodiments, each battery cell 11 includes an electrode assembly (not shown), which is disposed within the main body 111a. The electrode assembly includes a wound structure formed by stacking and winding a first electrode sheet, a separator, and a second electrode sheet. In other embodiments, the electrode assembly may also be a laminated structure, in which the first electrode sheet and the second electrode sheet have opposite polarities. Optionally, the battery cell 11 includes a soft-pack battery cell. Optionally, the battery cell 11 includes a square battery cell. Optionally, the battery cell 11 includes a cylindrical battery cell.

[0127] In some embodiments, each battery cell 11 includes an electrode terminal 112 , which is connected to the electrode assembly and extends from the battery cell housing 111 .

[0128] In some embodiments, see Figure 3 for a perspective view of a battery cell 11, wherein the electrode terminal 112 is not bent. Each battery cell casing 111 includes a main body 111a and a sealing portion 111b, which is connected to the main body 111a. The sealing portion 111b includes a first sealing portion 1112, from which the electrode terminal 112 extends.

[0129] In some embodiments, the sealing portion 111 b includes two second sealing portions 1115 . The two second sealing portions 1115 are located on opposite sides of the main body 111 a , and the second sealing portions 1115 are connected to the main body 111 a .

[0130] 1 to 5 , in some embodiments, the battery module 100 includes a bracket 20 , which defines a first opening 20 a extending through the bracket 20 . At least a portion of the battery cell assembly 10 is disposed within the bracket 20 .

[0131] In some embodiments, a portion of the detection member 30 is exposed within the first opening 20a. This provides space for the detection member 30 to move when the battery module 100 is subjected to external force or when the battery cell expands. This reduces the risk of damage to the detection member 30.

[0132] In some embodiments, the detection member 30 is connected to the cell housing 111 of the outermost cell 11 .

[0133] Referring to FIG. 10 , in some embodiments, the detection member 30 is disposed between adjacent battery cell casings 111 , which facilitates detecting the temperature of the battery cells 11 .

[0134] 8 and 10 , in some embodiments, along the first direction X, the detection member 30 is disposed between two adjacent battery cell casings 111 located in the middle of the plurality of battery cells 11. The temperature of the battery cell 11 in the middle is generally higher than that of the battery cell 11 located on the outside, further facilitating the detection of the temperature of the battery cell 11.

[0135] In some embodiments, the detection member 30 and the electrode terminal 112 are located on different sides of the main body 111 a to facilitate assembly of the detection member 30 .

[0136] In some embodiments, the electrode terminal 112 is located on the first side 1113 of the cell housing 111 , and a portion of the detection member 30 extends out of the first opening 20 a from the second side 1114 of the cell housing 111 . The first side 1113 and the second side 1114 are different sides of the cell housing 111 .

[0137] In some embodiments, the second side 1114 is not limited to the orientation shown in FIG. 2 , as long as it is located on a different side from the first side 1113 .

[0138] Please refer to FIG. 10 . In some embodiments, along the second direction Y, the first opening 20 a is opposite to at least one main body portion 111 a .

[0139] Referring to Figures 1 to 5 and 12 , in some embodiments, the bracket 20 includes a top wall 21 , and the top wall 21 and the battery cell assembly 10 are arranged along a first direction X. A first opening 20 a partially penetrates the top wall 21 . Along the first direction X, a portion of the detection member 30 is exposed through the first opening 20 a . The first opening 20 a provides space for the detection member 30 to move, reducing the risk of damage to the detection member 30 .

[0140] In some embodiments, the bracket 20 includes a front wall 22 connected to the top wall 21. The front wall 22 and the battery cell assembly 10 are arranged along the second direction Y. A portion of the first opening 20 a extends through the front wall 22. Along the second direction Y, a portion of the detection member 30 is exposed through the first opening 20 a. The portion of the first opening 20 a provides space for the detection member 30 to move, reducing the risk of damage to the detection member 30.

[0141] In some embodiments, the bracket 20 includes a rear wall 23 , the rear wall 23 is connected to the top wall 21 , and the front wall 22 and the rear wall 23 are arranged along the second direction Y.

[0142] In some embodiments, the first opening 20a can be provided on the top wall 21 and the rear wall 23. The first opening 20a partially penetrates the top wall 21, and a portion of the detection member 30 is exposed from the first opening 20a along the first direction X. The first opening 20a partially penetrates the rear wall 23. In a direction opposite to the second direction Y, a portion of the detection member 30 is exposed from the first opening 20a.

[0143] In some embodiments, the bracket 20 includes a right wall 24 connecting the top wall 21 , the front wall 22 , and the rear wall 23 .

[0144] In some embodiments, the first opening 20a may also be provided on the top wall 21 and the right wall 24. A portion of the first opening 20a passes through the top wall 21, and a portion of the detection member 30 is exposed from the first opening 20a along the first direction X. A portion of the first opening 20a passes through the right wall 24, and a portion of the detection member 30 is exposed from the first opening 20a along the third direction Z.

[0145] It is understandable that the positions of the first opening 20a and the detection member 30 can be adjusted according to actual needs.

[0146] In some embodiments, the bracket 20 includes a left wall 25 , and the right wall 24 and the left wall 25 are arranged along the third direction Z. The left wall 25 connects the top wall 21 , the front wall 22 , and the rear wall 23 .

[0147] In some embodiments, the bracket 20 includes a bottom wall 26 , and the top wall 21 and the bottom wall 26 are arranged along the first direction X. The bottom wall 26 connects the front wall 22 , the rear wall 23 , the right wall 24 , and the left wall 25 , and the top wall 21 connects the front wall 22 , the rear wall 23 , the right wall 24 , and the left wall 25 to form a receiving space.

[0148] In some embodiments, the top wall 21 includes an arc-shaped portion 21 a , the arc-shaped portion 21 a is connected to the front wall 22 , and the first opening 20 a passes through the arc-shaped portion 21 a .

[0149] In some embodiments, the arc portion 21 a connects at least one of the rear wall 23 , the right wall 24 , and the left wall 25 .

[0150] Referring to Figure 2, in some embodiments, the bracket 20 includes a first bracket 201 and a second bracket 202. The first bracket 201 connects to the second bracket 202 to form the aforementioned receiving space. The first opening 20a passes through the first bracket 201 to facilitate assembly. In another embodiment, the first bracket 201 is configured to be integrally injection molded.

[0151] In some embodiments, the number of the first openings 20 a and the number of the detection elements 30 can be multiple, and the number of the first openings 20 a is consistent with the number of the detection elements 30 .

[0152] In some embodiments, when the bracket 20 is provided with multiple first openings 20a, the multiple first openings 20a can be located on the same side of the battery cell assembly 10, or can be provided on different sides of the battery cell assembly 10. Each detection member 30 is connected to the battery cell shell 111, and a portion of each detection member 30 is exposed in a first opening 20a.

[0153] In some embodiments, multiple detection elements 30 can detect different electrical signals of the battery cells 11 .

[0154] In some embodiments, multiple detection elements 30 can detect the same signal of the battery cell 11 .

[0155] In some embodiments, multiple detection members 30 can be connected to different positions of the battery cell housing 111 .

[0156] Referring to Figure 15 , taking the example of two first openings 20a disposed on different sides of the battery cell assembly 10, in some embodiments, the bracket 20 has two first openings 20a, and the battery module 100 includes two detection members 30. One of the first openings 20a extends through the top wall 21 and the front wall 22, with a portion of one detection member 30 exposed through the first opening 20a. The other first opening 20a extends through the top wall 21 and the rear wall 23, with a portion of the other detection member 30 exposed through the first opening 20a.

[0157] Optionally, different electrical signals of the battery cell 11 may be detected by two detection components 30 . For example, one detection component 30 detects the temperature of the battery cell 11 , and the other detection component 30 detects the current of the battery cell 11 .

[0158] Optionally, the two detection components 30 may also detect the same electrical signal of the battery cell 11 . For example, the two detection components 30 both detect the temperature of the battery cell 11 , which facilitates comparison of the two detected temperatures and helps improve detection accuracy.

[0159] Optionally, the two detection members 30 may be arranged at different positions of the battery cell housing 111 to detect the temperatures at different positions of the battery cell housing 111 .

[0160] It is understandable that the number of the first openings 20a and the number of the detection elements 30 can be adjusted according to actual needs.

[0161] Referring to FIG. 15 , in some embodiments, along the third direction Z, the distance h1 between the detection member 30 and the main body 111a is less than half the length H of the main body 111a. The closer the detection member 30 is to the electrode terminal 112 , the higher the detected temperature of the battery cell 11, which further facilitates temperature detection of the battery cell 11.

[0162] 5 to 11 , the present application takes the example of the first opening 20a being provided on the top wall 21 and the front wall 22. In some embodiments, one end of the detection member 30 includes a detection portion 31, and optionally, the detection portion 31 is a temperature sensor.

[0163] In some embodiments, the detection unit 31 is disposed between two adjacent battery cell casings 111 .

[0164] In some embodiments, the detection member 30 includes a first connection portion 32 connected to the detection portion 31. The first connection portion 32 extends out of the bracket 20 from the first opening 20a.

[0165] In some embodiments, the other end of the detection member 30 includes a second connection portion 33 , the second connection portion 33 is connected to the first connection portion 32 , and the second connection portion 33 is configured to connect to the circuit board 40 .

[0166] In some embodiments, the second connection portion 33 is disposed on a side of the bracket 20 away from the battery cell assembly 10 in a direction opposite to the first direction X. Specifically, the second connection portion 33 is disposed on a side of the top wall 21 away from the battery cell assembly 10 and is connected to the circuit board 40 to transmit electrical signals to the circuit board 40. Optionally, the second connection portion 33 is welded to the circuit board 40.

[0167] In some embodiments, the detection member 30 is substantially U-shaped.

[0168] In some embodiments, the first connecting portion 32 includes a first section 321, which is connected to the detection portion 31. At least a portion of the first section 321 is disposed between two adjacent battery cell casings 111. Optionally, along the first direction X, the projection of the first section 321 is located within the projection of the battery cell casing 111. Optionally, a portion of the first section 321 extends beyond the battery cell casing 111.

[0169] In some embodiments, the first connecting portion 32 includes a second section 322 . The second section 322 is disposed on the top wall 21 . The second section 322 and the first section 321 are spaced apart along the first direction X.

[0170] In some embodiments, the first connecting portion 32 includes a third segment 323 . Along the second direction Y, the second segment 322 is located outside the battery cell assembly 10 .

[0171] In some embodiments, the first connecting portion 32 includes a bent section 324. The bent section 324 can reduce stress pulling when the detection member 30 is squeezed and moved, further reducing the risk of the detection member 30 being squeezed and damaged.

[0172] In some embodiments, a portion of the bent section 324 is exposed from the first opening 20 a.

[0173] In some embodiments, as shown in FIG11 , along the first direction X, a portion of the bending section 324 is exposed in the first opening 20 a. The first opening 20 a can provide space for the bending section 324 to bend and deform, thereby reducing stress and pulling on the bending section 324 and thereby reducing the risk of damage to the detection member 30 .

[0174] In some embodiments, as shown in FIG10 , along the second direction Y, a portion of the bending section 324 is exposed in the first opening 20 a. The first opening 20 a can provide space for the bending section 324 to bend and deform, thereby further helping the bending section 324 to reduce stress and pull, thereby further reducing the risk of damage to the detection member 30 .

[0175] In some embodiments, the third segment 323 connects the first segment 321 and the second segment 322 via a bent segment 324 .

[0176] In some embodiments, the bending segment 324 includes a first bending segment 324 a , and the first bending segment 324 a connects the first segment 321 and the third segment 323 .

[0177] In some embodiments, along the second direction Y, a portion of the first bending segment 324 a is exposed from the first opening 20 a .

[0178] In some embodiments, the bending segment 324 includes a second bending segment 324 b , which connects the second segment 322 and the third segment 323 .

[0179] In some embodiments, along the first direction X, the second bending segment 324 b is partially exposed from the first opening 20 a .

[0180] In some embodiments, along the second direction Y, a portion of the second bending segment 324 b is exposed from the first opening 20 a .

[0181] In some embodiments, the first connecting portion 32 includes a fourth segment 325 that connects the second segment 322 and the second connecting portion 33 .

[0182] In some embodiments, the bend section 324 further includes a third bend section 324c and a fourth bend section 324d. The third bend section 324c connects the second section 322 and the fourth section 325. The fourth bend section 324d connects the fourth section 325 and the second connecting portion 33. This helps reduce the stress and tension on the detection member 30, thereby reducing the risk of damage to the detection member 30.

[0183] Referring to Figures 1 to 6 , in some embodiments, a first recess 211 is defined on a side of the top wall 21 facing away from the battery cell assembly 10, and a portion of the detection member 30 is disposed within the first recess 211. Along the first direction X, the depth of the first recess 211 is greater than the thickness of the detection member 30, thereby reducing the space occupied by the detection member 30 in the first direction X.

[0184] In some embodiments, the second segment 322 is disposed in at least a portion of the first recess 211 . Along the first direction X, the depth of the first recess 211 is greater than the thickness of the second segment 322 .

[0185] In some embodiments, the battery module 100 includes a first fixing portion 103, and a second recess 212 is provided on the side of the top wall 21 facing away from the battery cell assembly 10. The first fixing portion 103 is provided in the second recess 212, and the second section 322 is located between the first fixing portion 103 and the top wall 21, which is conducive to fixing the second section 322, reducing the warping of the second section 322, and reducing the risk of the second section 322 being damaged by friction.

[0186] In some embodiments, along the first direction X, the depth of the second recess 212 is greater than the thickness of the first fixing portion 103 , which can reduce the space occupied by the first fixing portion 103 in the first direction X.

[0187] In some embodiments, the first fixing portion 103 is bonded to the second recess 212 , for example, by adhesive.

[0188] In some embodiments, the first fixing portion 103 is insulating. Optionally, the first fixing portion 103 includes foam and glue, and the foam is bonded to the second recess and the second section 322 by the glue. Optionally, the first fixing portion 103 includes a polycarbonate (PC) sheet.

[0189] In some embodiments, the battery module 100 includes a second fixing portion 104, a third recess 221 is defined in the front wall 22, and the first opening 20a communicates with the third recess 221. The second fixing portion 104 is located in the third recess 221, and a portion of the first bent section 324a is positioned between the second fixing portion 104 and the cell housing 111. This facilitates securing the first bent section 324a, reduces deformation of the first bent section 324a, and reduces the risk of frictional damage to the first bent section 324a.

[0190] In some embodiments, along the second direction Y, the depth of the third recess 221 is greater than the thickness of the second fixing portion 104 , which can reduce the space occupied by the second fixing portion 104 in the second direction Y.

[0191] In some embodiments, the second fixing portion 104 is bonded to the third recess 221 .

[0192] In some embodiments, the second fixing portion 104 has insulating properties. Optionally, the second fixing portion 104 includes foam and glue, and the foam is bonded to the third recess 221 by the glue. Optionally, the second fixing portion 104 includes a polycarbonate (PC) sheet.

[0193] In some embodiments, the battery module 100 includes an elastic member 105, which has insulating properties. The elastic member 105 is arranged in the first opening 20a. Along the second direction Y, the elastic member 105 is located between the second fixing portion 104 and the detection member 30, and the elastic member 105 connects the second fixing portion 104 and the detection member 30. Optionally, the elastic member 105 is located between the second fixing portion 104 and the third section 323. The elastic member 105 is arranged in the gap between the second fixing portion 104 and the third section 323, so that the second fixing portion 104 acts on the third section 323 through the elastic member 105, which is conducive to fixing the position of the detection member 30. Optionally, the elastic member 105 includes foam.

[0194] In some embodiments, along the second direction Y, the distance between the second fixing portion 104 and the third section 323 is less than the thickness of the elastic member 105 , so that the elastic member 105 arranged between the second fixing portion 104 and the third section 323 is in a compressed state, which is more conducive to fixing the position of the detection member 30 .

[0195] In some embodiments, the elastic coefficient of the elastic member 105 is smaller than the elastic coefficient of the second fixing portion 104 , thereby improving protection for the detection member 30 .

[0196] In some embodiments, the second fixing portion 104 and the elastic member 105 are integrally formed to facilitate assembly.

[0197] 8 and 12 to 17 , in some embodiments, the battery module 100 includes a first component 50 disposed between two adjacent cell casings 111 . The first component 50 has a second opening 50 a , and a portion of the detection member 30 is disposed in the second opening 50 a .

[0198] Along the first direction X, the thickness of the detection member 30 is smaller than the thickness of the first component 50. The first component 50 protects the detection member 30, reducing the risk of damage to the detection member 30 caused by compression.

[0199] In some embodiments, the detection portion 31 and the first section 321 are disposed in the second opening 50 a . Along the first direction X, the thickness of the detection portion 31 is smaller than the thickness of the first member 50 , and the thickness of the first section 321 is smaller than the thickness of the first member 50 .

[0200] In some embodiments, the second opening 50 a faces the second side 1114 of the battery cell assembly 10 .

[0201] In some embodiments, the second opening 50 a passes through the first member 50 .

[0202] In some embodiments, the second opening 50 a is recessed in the surface of the first component 50 , and along the first direction X, the thickness of the detection element 30 is smaller than the depth of the second opening 50 a .

[0203] In some embodiments, when multiple first openings 20a and multiple detection members 30 are provided, multiple second openings 50a are provided. Optionally, the number of the second openings 50a is the same as the number of the first openings 20a.

[0204] In some embodiments, the second opening 50 a extends from the sidewall of the first component 50 along the second direction Y, and a portion of the detection member 30 is configured to be disposed in the second opening 50 a along the second direction Y to facilitate assembly of the detection member 30 .

[0205] In some embodiments, along the second direction Y, the second opening 50 a penetrates one of the sidewalls of the first component 50 .

[0206] In some embodiments, along the third direction Z, guide portions 511 are provided on both sides of the second opening 50 a to facilitate the insertion of the detection member 30 into the second opening 50 a through the notch 51 .

[0207] In some embodiments, when the battery cell 11 is used within a safe range, when the first member 50 is subjected to the expansion pressure of the battery cell 11, the first member 50 is configured to have a constant thickness in the first direction X, thereby facilitating protection of the detection element 30. Optionally, the first member 50 includes an insulating sheet. Optionally, the first member 50 includes a polycarbonate (PC) sheet. Use within a safe range means that the rated voltage and current of the battery module 100 are not exceeded.

[0208] In some embodiments, the battery module 100 includes an adhesive member 60 . At least a portion of the adhesive member 60 is disposed at the second opening 50 a . The adhesive member 60 is connected to the detection member 30 and is connected to at least one of the adjacent battery cell casings 111 .

[0209] In some embodiments, the thermal conductivity of the adhesive 60 is greater than the thermal conductivity of the cell housing 111, which is beneficial for conducting heat to the detection element 30 and improving the accuracy of the detection. Optionally, the adhesive 60 includes thermally conductive glue.

[0210] In some embodiments, the adhesive 60 is applied to the first section 321 of the detection member 30 and inserted into the second opening 50 a.

[0211] In some embodiments, the detection member 30 is in contact with and connected to the battery cell housing 111 .

[0212] In some embodiments, the battery module 100 includes a buffer 70 to provide expansion space and pressure for the battery cell 11. Optionally, the buffer 70 includes foam.

[0213] In some embodiments, the elastic coefficient of the buffer member 70 is greater than the elastic coefficient of the first component 50 , which helps to reduce the risk of damage to the detection member 30 .

[0214] In some embodiments, the buffer 70 is disposed between adjacent battery cells 11 .

[0215] In some embodiments, the buffer 70 and the first member 50 are arranged in the first direction X. Alternatively, the buffer 70 and the first member 50 are arranged along the first direction X. Alternatively, the first member 50 and the buffer 70 are arranged along the first direction X.

[0216] Referring to FIG. 2 , in some embodiments, a buffer member 70 is disposed between the battery cell housing 111 and the bracket 20 to further provide expansion space and pressure for the battery cell 11 .

[0217] Please refer to Figure 17. In some embodiments, the top wall 21 is provided with a fourth recess 213. The buffer member 70 is partially provided in the fourth recess 213. The buffer member 70 is located between the battery cell shell 111 and the top wall 21, which is beneficial to reducing the thickness of the battery module 100 in the first direction X and reducing the occupied space.

[0218] In some embodiments, along the first direction X, the thickness of the buffer member 70 after being compressed is not less than the depth of the fourth recess 213 .

[0219] In some embodiments, the bottom wall 26 is provided with a fifth recess 261 , and the buffer member 70 is provided in the fifth recess 261 . The buffer member 70 is located between the battery cell shell 111 and the bottom wall 26 , which is beneficial to reducing the thickness of the battery module 100 in the first direction X and reducing the occupied space.

[0220] In some embodiments, along the first direction X, the thickness of the buffer member 70 after being compressed is not less than the depth of the fifth recess 261 .

[0221] In some embodiments, the battery module 100 includes a second member 101 and a plurality of conductive sheets 102. The plurality of conductive sheets 102 are disposed on a side of the second member 101 facing away from the battery cell assembly 10. The plurality of conductive sheets 102 are insulated from each other. Electrode terminals 112 of the plurality of battery cells 11 pass through the second member 101 and connect to the conductive sheets 102, thereby connecting the plurality of battery cells 11 in series or in parallel.

[0222] In some embodiments, the second component 101 includes an insulating bracket, and the conductive sheet 102 is fixed to the insulating bracket. For example, the conductive sheet 102 and the second component 101 are integrally formed through an injection molding process.

[0223] In some embodiments, the second member 101 includes a circuit board.

[0224] In some embodiments, the second component 101 includes a plurality of through holes, and the electrode terminals 112 pass through the through holes and are connected to the conductive sheet 102 .

[0225] 6 and 18 , the present application further provides a battery pack 200 using the battery module 100. The battery pack 200 further includes a circuit board 40 disposed on a side of the top wall 21 facing away from the battery cell assembly 10. The other end of the detection member 30 is connected to the circuit board 40.

[0226] In some embodiments, the detection member 30 extends out of the bracket 20 from the first opening 20 a and is connected to the circuit board 40 . The circuit board 40 is configured to receive an electrical signal from the detection member 30 .

[0227] Optionally, the circuit board 40 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 11.

[0228] Optionally, the circuit board 40 includes a flexible printed circuit (FPC). Optionally, the circuit board 40 includes a printed circuit board (PCB), and a plurality of first conductive lines (not shown) are provided on the circuit board 40.

[0229] In some embodiments, the battery pack 200 further includes a connector 80 connected to the circuit board 40. The connector 80 is configured to connect to an external device.

[0230] In some embodiments, the battery pack 200 includes a housing 90 , and the battery module 100 is disposed in the housing 90 .

[0231] Referring to Figure 19 , the present application also provides an electrical device 300 that utilizes the aforementioned battery pack 200. The electrical device 300 is connected to the connector 80. In one embodiment, the electrical device 300 of the present application may be, but is not limited to, an electronic device, a drone, a backup power supply, an electric vehicle, an electric motorcycle, an electric power-assisted bicycle, an electric tool, a large household battery module, and the like.

[0232] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments fall within the scope disclosed in the present application.

Claims

1. A battery module, characterized in that: include: A bracket, wherein the bracket is provided with a first opening, and the first opening passes through the bracket; A battery cell assembly, at least part of which is disposed in the bracket, and the battery cell assembly includes a plurality of battery cells; A detection member, one end of which is connected to the battery cell, and the other end of which passes through the first opening, and the other end of which is configured to be connected to a circuit board.

2. The battery module according to claim 1, characterized in that: The bracket comprises a top wall, and the top wall and the battery cell assembly are arranged along a first direction; Along the first direction, part of the first opening passes through the top wall; part of the detection element is exposed from the first opening.

3. The battery module according to claim 2, characterized in that: The bracket comprises a front wall, the front wall is connected to the top wall, and the front wall and the battery core assembly are arranged along the second direction; Along the second direction, part of the first opening passes through the front wall; part of the detection element is exposed in the first opening; The first direction is perpendicular to the second direction.

4. The battery module according to any one of claims 1 to 3, characterized in that: The battery cell comprises a battery cell shell, an electrode terminal and an electrode assembly, wherein the electrode assembly is arranged in the battery cell shell, and the electrode terminal is connected to the electrode assembly and extends from the battery cell shell; The portion of the electrode terminal protruding from the cell case and the first opening are located on different sides of the cell case.

5. The battery module according to any one of claims 2 to 4, characterized in that: The detection member further comprises a first connection portion, one end of the detection member comprises a detection portion, the other end of the detection member comprises a second connection portion, the first connection portion connects the detection portion and the second connection portion, and the detection portion is disposed between two adjacent battery cells; The first connection portion extends out of the bracket from the first opening.

6. The battery module according to claim 5, characterized in that: Along a direction opposite to the first direction, the second connecting portion is arranged on a side of the bracket away from the battery core assembly.

7. The battery module according to claim 5 or 6, characterized in that: The first connecting portion includes a first section, a second section, a third section and a bending section; The first section is connected to the detection section, the first section is connected to the second section, the third section is connected to the second section, and the second connecting section is connected to the second section; At least part of the first section is disposed between two adjacent battery cells; The second section and the first section are arranged at intervals along the first direction; The third section is exposed at the first opening; The third section connects the first section and the second section through the bending section.

8. The battery module according to claim 7, characterized in that: A portion of the bent section is exposed at the first opening.

9. The battery module according to claim 3, characterized in that: It also includes a first component, which is arranged between two adjacent battery cells; The first component is provided with a second opening, and a portion of the detection element is provided at the second opening; The second opening extends from the side wall of the first component along the second direction.

10. The battery module according to claim 9, characterized in that: Along the first direction, the thickness of the detection element is smaller than the thickness of the first component.

11. The battery module according to claim 9, characterized in that: The battery cell assembly further includes a buffer member, wherein the elastic coefficient of the buffer member is greater than the elastic coefficient of the first member; Wherein, the buffer is connected to the battery core assembly; and / or, The buffer is arranged between two adjacent battery cells.

12. The battery module according to claim 9, characterized in that: Along the second direction, the second opening passes through one side edge of the first component.

13. The battery module according to claim 9, characterized in that: It also includes an adhesive component, and the detection component is connected to the battery core through the adhesive component.

14. The battery module according to claim 13, characterized in that: The thermal conductivity of the adhesive is greater than the thermal conductivity of the battery cell casing.

15. The battery module according to any one of claims 2 to 14, characterized in that: A first recess is provided on a side of the top wall away from the battery cell assembly, and part of the detection member is provided in the first recess. Along the first direction, a depth of the first recess is greater than or equal to a thickness of the detection member.

16. The battery module according to claim 15, characterized in that: It also includes a first fixing portion, the top wall is provided with a second recessed portion, the first fixing portion is provided in the second recessed portion, and the detection element is located between the top wall and the first fixing portion.

17. The battery module according to any one of claims 3 to 14, characterized in that: It also includes a second fixing portion, the front wall is provided with a third recessed portion, the second fixing portion is provided in the third recessed portion, and a portion of the detection member is located between the battery cell housing and the second fixing portion.

18. The battery module according to claim 17, characterized in that: It also includes an elastic member, at least a portion of which is disposed at the first opening, and along the second direction, the elastic member is located between the second fixing portion and the detecting member, and the elastic member connects the second fixing portion and the detecting member.

19. The battery module according to any one of claims 1 to 18, characterized in that: The detection element includes a temperature sensor.

20. The battery module according to any one of claims 1 to 19, characterized in that: The bracket includes a first bracket and a second bracket, the first bracket is connected to the second bracket to form a receiving space, and the first opening passes through the first bracket.

21. A battery module, characterized in that: include: A bracket, wherein the bracket is provided with a first opening, and the first opening passes through the bracket; A battery cell assembly, at least part of which is disposed in the bracket, and the battery cell assembly comprises Multiple cells; A detection member, one end of which is disposed between adjacent battery cells; or one end of which is disposed along a first direction with the battery cell assembly; The other end of the detection member passes through the first opening, and the other end of the detection member is configured to be connected to the circuit board.

22. A battery pack, comprising the battery module according to any one of claims 1 to 21, characterized in that: It also includes a circuit board, which is arranged on a side of the bracket away from the battery core assembly, and the other end of the detection member is connected to the circuit board.

23. The battery pack according to claim 22, characterized in that: It comprises a shell, and the battery module is arranged in the shell.

24. An electrical equipment, characterized in that: Comprising a battery pack as claimed in claim 22 or 23.

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